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diff --git a/pdfrw/pdfreader.py b/pdfrw/pdfreader.py
index 2c9c3a2..feb025b 100644
--- a/pdfrw/pdfreader.py
+++ b/pdfrw/pdfreader.py
@@ -12,9 +12,10 @@ of the object.
'''
import gc
import binascii
-import collections
import itertools
+from collections import defaultdict
+
from .errors import PdfParseError, log
from .tokens import PdfTokens
from .objects import PdfDict, PdfArray, PdfName, PdfObject, PdfIndirect
@@ -340,7 +341,7 @@ class PdfReader(PdfDict):
def parse_xref_stream(self, source, int=int, range=range,
enumerate=enumerate, islice=itertools.islice,
- defaultdict=collections.defaultdict,
+ defaultdict=defaultdict,
hexlify=binascii.hexlify):
''' Parse (one of) the cross-reference file section(s)
'''
diff --git a/tests/expected.py b/tests/expected.py
index d153fc3..62c29aa 100644
--- a/tests/expected.py
+++ b/tests/expected.py
@@ -12,8 +12,8 @@
'''
import os
-import collections
from pdfrw.py23_diffs import convert_load
+from collections import defaultdict
root_dir = os.path.dirname(__file__)
result_dir = 'tmp_results'
@@ -28,7 +28,7 @@ for sourcef in ('mytests.txt', 'expected.txt'):
def results():
- results = collections.defaultdict(set)
+ results = defaultdict(set)
with open(expectedf, 'rb') as f:
for line in f:
line = convert_load(line)
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